JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (06): 130-134.doi: 10.3969/j.issn.1000-2006.2014.06.025

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Study on adsorption capacity of the charcoal obtained by pyrolyzation of waste tire

TIAN Yongjing, WANG Zengbin, WANG Xiaokang, LIU Xinxin, SUN Haibin, LUAN Dalei   

  1. College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
  • Online:2014-12-31 Published:2014-12-31

Abstract: NATPC(non-activated tire-based pyrolytic char), the solid products from waste tire pyrolysis without subsequent activation procedure, was used as an adsorbent in this paper to determine its potential ability. NATPCs were obtained from shredded tires(40-400 μm)in 450-800 ℃ at 15-40 ℃/min for 0.5-2 h. Methylene blue, humic acid, phenol and Cu2+ were chosen as adsorbates to evaluate the adsorption capacities of NATPCs. Results showed that the pyrolysis condition had a great influence on the adsorption capacity of NATPCs, of which temperature was the greatest, heating time was greater, particle size was lesser and heating rate is the least. The adsorption performance onto NATPC prepared with 400 μm tire powders in 800℃ at 40℃/min for 1.5 h was conducted under different contact time, adsorbent dosage, initial concentration, pH and temperature. Although the SBET of NATPC was about 114 m2/g, but NATPC could uptake Cu2+, methylene blue and humic acid well. For Cu2+, methylene blue and humic acid, the maximum adsorption with NATPC dosage were 1 g/L, 2 g/L, and 1.5 g/L, respectively; the contact time were 2 h, 1 h, and 3 h; the initial absorbance concentration were 120 mg/L, 100 mg/L, and 6 mg/L, pH were 4.5-6, 1.0 and 8.0. It indicated NATPC could be used as an excellent adsorbent with good efficiency, simple manufacture and low cost. The appropriate adsorbates for NATPC adsorption were heavy metal and macromolecules.

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